[TenTec] 500 HZ Roofing Filter Attenuation-Orion

[NJ0IP]

Toby, have you adjusted the center frequency offset for the 500 Hz filter.
If not, that might be the reason you have too much attenuation.  Then again
the filter might be defective.  There should be no decrease in audio gain
when it switches in.

73
Rick

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com]On Behalf Of Toby Pennington
Sent: Wednesday, August 04, 2004 11:24 AM
To: Ten Tec List
Subject: [TenTec] 500 HZ Roofing Filter Attenuation-Orion


I have noticed that on 20 mtrs  with all the roofing filters turned on to
AUTO, that there is considerable attenuation of receiver audio when the
bandiwdth hits the 370 HZ level.  Of course I am down in the cw portion of
the band. It doesn't seem to bother loud signals but does indeed surpress
weak signal reception when the bandwidth is anywhere between 370 HZ down to
200HZ.  At 190 Hz the audio comes back up because then the 250 HZ filter
kicks in.  I can turn the 500 HZ filter off and the audio is normal strength
level. Does anyone else notice this or does this sound like a bad 500HZ
roofing filter?   One other thing, I don't seem to notice it on the low
bands, but 20 mtrs and above it is most noticeable.  I noticed in the QST
review of the Orion the reviewer noted a somewhat  similar observation with
the 500 HZ filter.  Toby W4CAK
_______________________________________________
TenTec mailing list
TenTec at contesting.com
http://lists.contesting.com/mailman/listinfo/tentec